PLATE VI 

 PHOTOMICROGRAPHS OF SECTIONS OF GNATHAL AND CARAPACE PLATES 

 Fig. 14. A section through the "pick" of the antero-supra-gnathal plate. 

 Fig. 15. A more highly magnified section of the same plate. 

 Fig. 16. A section through the middle part of the intero- lateral plate. 

 Fig. 17- A section of the same plate under higher magnification. 



Figures 1 and 3, x32; Figures 2 and 4, XllO. 



